In a medium pot add the Chickpeas and bring the water that Chickpeas were hydrating overnight, plus more water to be 5-6 cm above Chickpeas, to a boil. Reduce the heat simmer for about 45 minutes with lid almost covering the pot. You want your Chickpeas soft but not overcooked. Avoid cleaning the foam created in the water. Strain and set aside.
In a small bowl pour the oil and the vinegar, add the mustard, thyme, cumin salt and pepper and whisk.
In a serving bowl add the chickpeas, the gammon, olives, sundried tomatoes and pour the vinaigrette. Toss to combine.